25 Series Bearing Bore Plate Sprockets - 74 Tooth

8 different offerings of our 25 Series Plate Sprockets. These are perfect for meshing with roller chain and finally getting that-thing-that-you-need-to-spin moving!

These aluminum sprockets work perfectly with any of our 6 hole hubs and mesh with #25 roller chain.  They also work with other build systems that use a 2 in. bolt circle for mounting. The larger versions also have a mounting pattern compatible with 2x1 box tube usefull for making arms.

S25-16HA-500 Hex Sprocket 

Specifications:

• 16 tooth, 25 series, 7075 Aluminum Sprocket
• Material: 7075 aluminum
• Outside diameter: 1.39 inch
• Pitch diameter: 1.29 inch
• Weight: 0.036 pound
• Bore: 0.502 inch wide hex hole
• Sprocket width: 0.123 inch
• Overall hub and sprocket width: 0.405 inch

Specifications:

• Bore: 0.500 in. Hex
• Series: #25
• Weight: 0.03 Pounds
• Material: 7075-T6 Aluminum
• Thickness: 0.1 in.
• Tooth Count: 18
• Hub Diameter: 0.873 in.
• Overall Depth: 0.4 in.
• Pitch Diameter: 1.440 in.
• Outside Diameter: 1.568 in.

Product Overview

The Magic Sprocket. 

This sprocket allows the use of two runs of #25 series chain inside 2x1 box tubing for a perfect fit, prohibiting the chain from skipping off. Build your own chain-in-tube drive with your favorite wheels and the help of this magic sprocket.

This product was originally pioneered by Anthony Lapp from 221 Robotic Systems.  Additionally, special thanks to Ty Tremblay and Team 319 for their insight and design advice on this product. This product builds upon this popular idea by adding chamfers to the teeth of the sprocket, as well as bosses on the faces to prevent the sprocket from rubbing the outer races of adjacent bearings.

Specifications

• Bore: 0.50 in. Hex
• Boss Diameter: 0.75 in.
• Material: 7075-T6 Aluminum
• Number of Teeth: 17
• Outside Diameter: 1.492 in.
• Overall Thickness: 0.49 in.
• Pitch Diameter: 1.361 in.
• Series: 25
• Sprocket Thickness: 0.1 in.

Documents

CAD File(s)
am-3999 17T 25 Chain Double Sprocket For WCD.STEP

Layout Print(s)
am-3999 17T 25 Chain Double Sprocket For WCD.PDF